Cavo Nullmodem (25-25)

Cavo per due apparecchiature DTE (esempio due computer).

25 PIN D-SUB FEMALE (AlComputer 1). (Al Computer 2).

25 PIN D-SUB FEMMINA al Computer 1.
25 PIN D-SUB FEMMINA al Computer 2.

	D-Sub 1	D-Sub 2
Receive Data	3	2	Transmit Data
Transmit Data	2	3	Receive Data
Data Terminal Ready	20	6+8	Data Set Ready + Carrier Detect
System Ground	7	7	System Ground
Data Set Ready + Carrier Detect	6+8	20	Data Terminal Ready
Request to Send	4	5	Clear to Send
Clear to Send	5	4	Request to Send

Nota: I pinsDSR & CD sono ponticellati per far credere al programma di essere on-line.